PDF 转图片并插入到 EXCEL 再转PDF

pom.xml 引用

XML 复制代码

<dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-cells</artifactId>
            <version>21.11</version>
        </dependency>
        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-words</artifactId>
            <version>21.11</version>
        </dependency>

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.24</version>
        </dependency>

代码 PDF 转图片其中Excel 转PDF 可以参考上一篇

java 复制代码

import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.io.IoUtil;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.CustomCellWriteHeightConfig;
import com.CustomPictureHandler;
import com.PictureModel;
import com.TtIncomingInspectionReportExcel;
import com.AsposeCellsUtil;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class TestMain {

    public static void main(String[] args) {

        Long start = new Date().getTime();
        try{
            FileInputStream fis = new FileInputStream("E:\\workData\\ZYInspectionFillReport.xlsx");
            FileOutputStream fos = new FileOutputStream("E:\\workData\\old.xlsx");

            TtIncomingInspectionReportExcel reportExcel = new TtIncomingInspectionReportExcel();

            ExcelWriter excelWriter = EasyExcel.write(fos)
                    .registerWriteHandler(new CustomCellWriteHeightConfig())
                    .withTemplate(fis)
                    .build();
            WriteSheet writeSheet = EasyExcel.writerSheet().build();
            //开启自动换行,自动换行表示每次写入一条list数据是都会重新生成一行空行,此选项默认是关闭的,需要提前设置为true
            FillConfig fillConfig = FillConfig.builder().forceNewRow(Boolean.TRUE).build();

            excelWriter.fill(reportExcel.getClassList(), fillConfig, writeSheet);

            List<PictureModel> pictureModelList = getPictureModels();

            //设置 COA图片
            if(CollectionUtil.isNotEmpty(pictureModelList)){
                WriteSheet writeSheetCoa = EasyExcel.writerSheet("COA文件")
                        .registerWriteHandler(new CustomPictureHandler(pictureModelList, "COA文件"))
                        .build();
                //对象
                excelWriter.fill(reportExcel, writeSheetCoa);
            }
            //对象
            excelWriter.fill(reportExcel, writeSheet);
            excelWriter.finish();

            reportExcel = null;
            IoUtil.close(fis);
            IoUtil.close(fos);
            //创建Workbook 实例并加载示例文档
            String copyFilePath = "E:\\workData\\old.pdf";
            AsposeCellsUtil.excelToPdf("E:\\workData\\old.xlsx", new FileOutputStream(copyFilePath));

        }catch (Throwable t){
            t.printStackTrace();
        }
        Long end = new Date().getTime();
        System.out.println(end - start);

    }

    private static List<PictureModel> getPictureModels(){
        List<PictureModel> data = new ArrayList<>();

        String pdfPath = "E:\\BaiduNetdiskDownload\\WXWork\\202405080027_戴陆文2的试用期员工转正述职评分（数字产品BG）.pdf";
        try{
            File pdf = new File(pdfPath);
            PDDocument document = PDDocument.load(new FileInputStream(pdf));

            List<BufferedImage> images = new ArrayList<>();
            // 创建PDF渲染器
            PDFRenderer pdfRenderer = new PDFRenderer(document);
            for (int i = 0; i < document.getNumberOfPages(); i++) {
                /**
                 * 《 72 》 此处设置得越大像素越高，生成得时候也会越久
                 * DPI 的设置一般根据具体的需求和使用场景来决定。DPI 越高，生成的图片分辨率越大，图像质量也越高，
                 * 但同时文件大小也会变得更大。通常情况下，如果需要对生成的图片进行放大、裁剪等操作，建议将 DPI 设置得较高，
                 * 以保证图像质量和细节的清晰度；如果只是需要简单地浏览或共享图片，可以适当降低 DPI 以减小文件大小。在实际开发中，
                 * 可以根据不同的应用场景进行调整。一般来说，72 DPI 是一个比较常见的默认值，可以作为参考。
                 */
                BufferedImage image = pdfRenderer.renderImageWithDPI(i, 100, ImageType.RGB);
                images.add(image);
            }

            int row = 0;
            for(int i = 0; i < images.size(); i++){
                try{
                    int statRow = row;
                    int endRow = row+1;
                    ByteArrayOutputStream os = new ByteArrayOutputStream();
                    ImageIO.write(images.get(i), "png", os);
                    data.add(PictureModel.createPictureModel("COA文件", statRow, endRow, 0, 0, os.toByteArray(), "png"));
                    row = endRow + 1;
                }catch (Throwable t){
                    t.printStackTrace();
                }
            }

        }catch (Throwable t){
            t.printStackTrace();
        }
        return data;
    }
}